Cisco Callmanager; Access Gateways - Cisco WS-X6066-SLB-APC - Content Switching Module Software Manual

Understanding How a VoIP Network Works
Example 4—Two Cisco IP Phone 7960s and One PC
Example 4 shows two IP phones connected to the 10/100 port on the Catalyst 6000 family switch and
one PC connected to the PC-to-phone jack on the phone. The PC behaves as if it is connected directly to
the 10/100 port on the Catalyst 6000 family switch. The first phone can be powered through the
10/100 port or wall-powered. The second phone and the PC must be wall-powered.
For information on configuring Cisco IP phones and third-party vendor phones, refer to the
Note
documentation that shipped with the phone.

Cisco CallManager

Cisco CallManager is an open and industry-standard call processing system; its software runs on a
Windows NT server and sets up and tears down calls between phones, integrating traditional PBX
functionality with the corporate IP network. Cisco CallManager manages the components of the IP PBX
system, the phones, access gateways, and the resources necessary for such features as call conferencing
and media mixing. Each Cisco CallManager manages the devices within its zone and exchanges
information with the Cisco CallManager in charge of another zone to make calls possible across multiple
zones. Additionally, Cisco CallManager can work with existing PBX systems to route a call over the
Public Switched Telephone Network (PSTN).
For information on configuring Cisco CallManager to work with the IP devices described in this
Note
chapter, refer to the Cisco CallManager Administration Guide, Release 3.0, the Configuration Notes
for Cisco CallManager Release 3.0,
Guide publications.

Access Gateways

Access gateways allow the IP PBX system to talk to existing PSTN or PBX systems. Access gateways
consist of analog station gateways, analog trunk gateways, digital trunk gateways, and a converged voice
gateway.
These sections describe the gateways:
•
•
•
•
Analog Station Gateway
The Catalyst 6000 family 24-port Foreign Exchange Station (FXS) analog interface module allows plain
old telephone service (POTS) phones and fax machines to connect to the IP PBX network. The analog
station gateway behaves like the PSTN side for the POTS equipment. It requires an IP address, is
registered with Cisco CallManager in its domain, and is managed by Cisco CallManager.
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
44-4
Analog Station Gateway, page 44-4
Analog Trunk Gateway, page 44-5
Digital Trunk Gateway, page 44-6
Converged Voice Gateway, page 44-7
Cisco CallManager v3.0 Remote Serviceability Users
and the
Chapter 44 Configuring a VoIP Network
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